Selznick Scientific Software, LLC

A Beautiful and Simple Lunar Calendar

MoonMenu calculates lunar data for any given date between the years 1923 and 2039. Interactively explore, investigate and predict our moon's mysterious revelations right from your menu bar. Whether you're a professional or an amateur - MoonMenu is resourceful, educational and just plain fun!

"Yes I love it and have recommeded it to my computer friends, I own two moon watches one a digital - which has an enormous amount of info but as good as it is ( and pricey ) your program is what I been looking for a long time. A great prouduct and a great price." - Nevada City, Nevada County

Lunation: Lunations begin and end at the new moon. The number is the index of the current lunation. This number can be used as input to various functions to compute the date within other calendar systems.

Blue Moon: The second full moon in one month. This is a rare event. See 1/31/99 or 3/31/99 for a sample. Can you find any others?

For correctness, I compiled and compared MoonMenu results to the "NEWMOON" program found in Montenbruck and Pfleger, 1998, Astronomy on the Personal Computer,
Springer - Verlag Berlin Heidelberg New York.